Blackboard eraser with self-cleaning function

The utility model discloses a blackboard eraser with a self-cleaning function, which belongs to the technical field of multifunctional teaching aids and comprises two opposite mounting plates, vertical sliding grooves are arranged at the bottoms of the two mounting plates, and a connecting sliding plate capable of sliding up and down in each sliding groove is arranged in each sliding groove. A spring is arranged between the upper end of each connecting sliding plate and the corresponding sliding groove, the lower end of each connecting sliding plate extends out of a groove opening of the corresponding sliding groove, a wiping body box with an opening in the upper end and a cleaning cavity is fixedly arranged between the two connecting sliding plates, and a wiping body cleaning device is arranged in the cleaning cavity. Two opposite wiping bodies are rotationally arranged between one sides of the two mounting plates, and each wiping body is provided with two opposite wiping surfaces; an angle adjusting device